Cat Wheel Dozers are designed with durability built in, ensuring maximum availability through multiple life cycles. With optimized performance and simplified serviceability, our machines allow you to move more material efficiently and safely at a lower cost per ton. Engineered for your demanding work in large dozing applications, the 844 Wheel Dozer is the largest in the Cat Wheel Dozer line and is an ideal match for large mining operations, power generating utilities, the general contracting industry and wherever mobility, versatility and compaction is needed.
Engine Model C27 Cat®
Rated Speed 1800 r/min
Gross Power - ISO 14396 752 HP
Gross Power - SAE J1995 766 HP
Bore 5.4in
Displacement 1649.5in³
Emissions U.S. EPA Tier 4 Final and EU Stage V or China Nonroad Stage III Emissions standards, equivalent to U.S. EPA Tier 2
Engine Model C27 Cat®
Gross Power - ISO 14396 752HP
Gross Power - SAE J1995 766HP
Net Power - SAE J1349 - High Ambient 648HP
Net Power - SAE J1349 - Standard Ambient 699HP
Peak Torque - Speed 2624lb/ft
Rated Speed 1800r/min
Stroke 6in
Torque Rise 18%
Blade Capacities 15.9 - 30.7 m3 (20.7 - 40.2 yd3)
Operating Weight 165089lb
Converter Drive - Forward 1 4.5mile/h
Converter Drive - Forward 2 8.3mile/h
Converter Drive - Forward 3 14.2mile/h
Converter Drive - Reverse 1 4.9mile/h
Converter Drive - Reverse 2 9.1mile/h
Converter Drive - Reverse 3 15.5mile/h
Direct Drive - Forward 1 Lock-up disabled
Direct Drive - Forward 2 8.5mile/h
Direct Drive - Forward 3 15.2mile/h
Direct Drive - Reverse 1 5.4mile/h
Direct Drive - Reverse 2 9.6mile/h
Direct Drive - Reverse 3 16.4mile/h
Transmission Type Cat Planetary Power Shift
Cylinder, Double Acting - Tilt and Tip, Bore and Stroke 210 mm × 188 mm (8.25 in × 7.4 in)
Cylinders, Double Acting - Lift, Bore and Stroke 133 mm × 1535 mm (5.25 in × 60.4 in)
Output at 2,000 rpm and 6900 kPa (1,000 psi) 82gal/min
Relief Valve Setting - Bulldozer (Large Pump) 2700psi
Relief Valve Setting - Tilt Cylinders (Small Pump) 2920psi
Maximum Flow 94.3gal/min
Minimum Turning Radius - Over Blade 34ft
Relief Valve Setting 4500psi
Steering System - Circuit Pilot, load sensing
Steering System - Pump Piston, variable displacement
Total Steering Angle 35°
Cooling System 54.9gal (US)
Crankcase 20gal (US)
Differential - Final Drives - Front 71.6gal (US)
Differential - Final Drives - Rear 68.9gal (US)
Fuel Tank - Standard 286.6gal (US)
Hydraulic System - Implement and Hydraulic Fan 68.9gal (US)
Hydraulic System - Steering and Braking 34.9gal (US)
Transmission 29.1gal (US)
Air Conditioning The air conditioning system on this machine contains the fluorinated greenhouse gas refrigerant R134a (Global Warming Potential = 1430). The system contains 1.8 kg of refrigerant which has a CO2 equivalent of 2.574 metric tonnes.
Front Fixed
Oscillation Angle 8.5°
Rear Trunnion
Brakes Meets ISO 3540:2011
Machine Sound Level (ISO 6395:2008) 115dB(A)
Operator Sound Level (ISO 6396:2008) 69dB(A)
Machine Sound Level (ISO 6395:2008) 113dB(A)
Operator Sound Level (ISO 6396:2008) 69dB(A)
ROPS/FOPS ISO 3471:2008 and ISO 3449:2005 Level II Standards
Centerline of Front Axle to Hitch 7.5ft
Centerline of Rear Axle to Edge of Bumper 12.5ft
Ground Clearance 2ft
Height - Top of Exhaust Pipe 16.6ft
Height - Top of Hood 12.7ft
Height - Top of ROPS 17.2ft
Length - With Blade on Ground 36.5ft
Wheel Base 15.1ft
Standard and optional equipment may vary. Consult your Cat dealer for details.
Air conditioner and heater with automatic temperature control
Cab, sound-suppressed pressurized, protective structure (ROPS/FOPS), radio ready for (entertainment) includes antenna, speakers and converter (12V, 10-15 amp)
12V power port for mobile phone or laptop connection
Cigar lighter and ashtray
Coat hook
Electro-hydraulic blade controls (joystick)
Flip-up armrest
Heater and defroster
Horn, electric
Instrumentation, gauges: - Engine coolant temperature - Fuel level - Ground speed - Gear - Hydraulic oil temperature - Speedometer/tachometer - Torque converter temperature
Instrumentation, warning indicators: - Action alert system, three category - Automatic transmission model enable status - Brake malfunction - Bucket float status - Delayed engine shutdown status - Engine idle shutdown status - Engine malfunction - Fuel economy mode enable status - Hydraulic lockout - Lockup clutch enable status - Low fuel level - Parking brake status - Rimpull control enable status - Seatbelt warning - Secondary steering (if equipped) - Throttle lock status - Transmission gear
Keypad, control with indicator lights: - Auto trans mode speed range - Auto/manual transmission mode - Lockup clutch - Reduced rimpull - Throttle lock
Light, dome (cab)
Lunchbox and beverage holders
Mirrors, rearview (externally mounted)
Seat, premium with heated and actively cooled leather, adjustable lumbar support, air adjustable bolsters on the seat and backrest, seat cushion tilt adjustment, and adjustable-length seat cushion
STIC control system with steering lock
Tinted glass
Wet-arm wipers/washers (front, rear and corner) intermittent front wiper
Converter (12V, 10/15 amp) and power port
Brakes, oil cooled, multi-disc, service/secondary
Axle-shaft oil-disc service brake
Electro hydraulic parking brake
Cat clean emission module (Tier 4 only)
Demand fan
Engine Cat C27
Fuel priming pump (electric)
Ground level engine shutoff
Mufflers (under hood) (Tier 2 only)
Precleaner, engine air intake
Radiator, Aluminum Modular (AMR)
Separated cooling system
Starting aid, (ether) automatic
Throttle Lock electronic
Torque Converter, Impeller Clutch with lock-up clutch feature and rimpull control system
Transmission, 534 mm (21 in) planetary power shift (electronic) (3F/3R)
Alternator, 150 amp
Batteries, maintenance free (4 - 1,400 CCA)
Deutsch terminal connectors
Electrical system, 24V
Electronic transmission control
Lighting system, halogen (front and rear) lighting, access stairway, engine compartment
Starting and charging system, 24V
Starter lockout in bumper
Starting receptacle for emergency start
Transmission lockout in bumper
Vital Information Management System (VIMS) 3G with graphical information display: external data port, customizable operator profiles
Case drain filters
Coupling, Caterpillar O-ring face seals
Guards, crankcase and power train
Hitch, drawbar with pin
Hoses, Cat XT
Oil sampling valves
Product Link™
Camera, rear vision
Implement lockout switch
Seat belt, retractable, 76 mm (3 in) wide
Trainer seat with lap belt
Alarm, back-up
Emergency platform egress
Stairway, left and right rear access
Steering, secondary
Toe kicks
Fenders, steel (front)
Axle temperature sensor
Battery disconnect and jump start receptacle, bumper
Economy mode with on demand throttle
Engine, crankcase, 500 hour interval with CH4
Engine idle management features: - Auto idle kickdown - Delayed engine shutdown - Engine idle shutdown
Grouped/labeled lube points
Positive flow control hydraulic system
Sight Gauges: hydraulic tanks, steering/fan and implement/brake, and transmission
Steering, load sensing
Vandalism protection caplocks
Premixed 50% concentration of extended life coolant with freeze protection to -34° C (-29° F)
Standard and optional equipment may vary. Consult your Cat dealer for details.
50° C (-58° F) antifreeze
Engine oil change system, high speed, Wiggins
Engine block heater 120V or 240V
High ambient cooling - software
Semi-U - 17.8 m3 (23.3 yd3)
HD Semi-U - 16.1 m3 (21.1 yd3)
Coal - 30.7 m3 (40.2 yd3)
Cab precleaner
AM/FM/MP3 radio
Satellite Sirius radio with Bluetooth
LED warning strobe
CB radio ready
Window sun shade
Front and rear roading fenders
Fast fill fuel system (Shaw-Aero)
Axle oscillation stop
Paint, black blade rear
Venturi stack
